<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			div {
				border: 10px solid green;
				width: 200px;
				height: 100px;
			}

			.d1 {
				margin: 10px 20px 30px 40px;
			}
			
			.d2 {
				/* margin: 10px 20px 30px; */
				margin: 1%;
			}
			
			* {
				margin: 0px;
			}
		</style>
	</head>
	<body>
		<div class="d1">第一个div</div>
		<div class="d2">第二个div</div>
		<p>段落</p>
		<ul>
			<li>博为峰</li>
		</ul>
	</body>
</html>
